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        <h1><a href="http://developer.yahoo.com/yui/" title="Yahoo! UI Library">Yahoo! UI Library</a></h1>
        <h3>dom&nbsp; <span class="subtitle">3.1.1</span></h3>
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                 &gt; dom-region.js (source view) 
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                        <div class="highlight"><pre><span class="p">(</span><span class="kd">function</span><span class="p">(</span><span class="nx">Y</span><span class="p">)</span> <span class="p">{</span>
<span class="kd">var</span> <span class="nx">TOP</span> <span class="o">=</span> <span class="s1">&#39;top&#39;</span><span class="p">,</span>
    <span class="nx">RIGHT</span> <span class="o">=</span> <span class="s1">&#39;right&#39;</span><span class="p">,</span>
    <span class="nx">BOTTOM</span> <span class="o">=</span> <span class="s1">&#39;bottom&#39;</span><span class="p">,</span>
    <span class="nx">LEFT</span> <span class="o">=</span> <span class="s1">&#39;left&#39;</span><span class="p">,</span>

    <span class="nx">getOffsets</span> <span class="o">=</span> <span class="kd">function</span><span class="p">(</span><span class="nx">r1</span><span class="p">,</span> <span class="nx">r2</span><span class="p">)</span> <span class="p">{</span>
        <span class="kd">var</span> <span class="nx">t</span> <span class="o">=</span> <span class="nb">Math</span><span class="p">.</span><span class="nx">max</span><span class="p">(</span><span class="nx">r1</span><span class="p">[</span><span class="nx">TOP</span><span class="p">],</span> <span class="nx">r2</span><span class="p">[</span><span class="nx">TOP</span><span class="p">]),</span>
            <span class="nx">r</span> <span class="o">=</span> <span class="nb">Math</span><span class="p">.</span><span class="nx">min</span><span class="p">(</span><span class="nx">r1</span><span class="p">[</span><span class="nx">RIGHT</span><span class="p">],</span> <span class="nx">r2</span><span class="p">[</span><span class="nx">RIGHT</span><span class="p">]),</span>
            <span class="nx">b</span> <span class="o">=</span> <span class="nb">Math</span><span class="p">.</span><span class="nx">min</span><span class="p">(</span><span class="nx">r1</span><span class="p">[</span><span class="nx">BOTTOM</span><span class="p">],</span> <span class="nx">r2</span><span class="p">[</span><span class="nx">BOTTOM</span><span class="p">]),</span>
            <span class="nx">l</span> <span class="o">=</span> <span class="nb">Math</span><span class="p">.</span><span class="nx">max</span><span class="p">(</span><span class="nx">r1</span><span class="p">[</span><span class="nx">LEFT</span><span class="p">],</span> <span class="nx">r2</span><span class="p">[</span><span class="nx">LEFT</span><span class="p">]),</span>
            <span class="nx">ret</span> <span class="o">=</span> <span class="p">{};</span>
        
        <span class="nx">ret</span><span class="p">[</span><span class="nx">TOP</span><span class="p">]</span> <span class="o">=</span> <span class="nx">t</span><span class="p">;</span>
        <span class="nx">ret</span><span class="p">[</span><span class="nx">RIGHT</span><span class="p">]</span> <span class="o">=</span> <span class="nx">r</span><span class="p">;</span>
        <span class="nx">ret</span><span class="p">[</span><span class="nx">BOTTOM</span><span class="p">]</span> <span class="o">=</span> <span class="nx">b</span><span class="p">;</span>
        <span class="nx">ret</span><span class="p">[</span><span class="nx">LEFT</span><span class="p">]</span> <span class="o">=</span> <span class="nx">l</span><span class="p">;</span>
        <span class="k">return</span> <span class="nx">ret</span><span class="p">;</span>
    <span class="p">},</span>

    <span class="nx">DOM</span> <span class="o">=</span> <span class="nx">Y</span><span class="p">.</span><span class="nx">DOM</span><span class="p">;</span>

<span class="nx">Y</span><span class="p">.</span><span class="nx">mix</span><span class="p">(</span><span class="nx">DOM</span><span class="p">,</span> <span class="p">{</span>
    <span class="cm">/**</span>
<span class="cm">     * Returns an Object literal containing the following about this element: (top, right, bottom, left)</span>
<span class="cm">     * @method region</span>
<span class="cm">     * @param {HTMLElement} element The DOM element. </span>
<span class="cm">     @return {Object} Object literal containing the following about this element: (top, right, bottom, left)</span>
<span class="cm">     */</span>
    <span class="nx">region</span><span class="o">:</span> <span class="kd">function</span><span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="p">{</span>
        <span class="kd">var</span> <span class="nx">xy</span> <span class="o">=</span> <span class="nx">DOM</span><span class="p">.</span><span class="nx">getXY</span><span class="p">(</span><span class="nx">node</span><span class="p">),</span>
            <span class="nx">ret</span> <span class="o">=</span> <span class="kc">false</span><span class="p">;</span>
        
        <span class="k">if</span> <span class="p">(</span><span class="nx">node</span> <span class="o">&amp;&amp;</span> <span class="nx">xy</span><span class="p">)</span> <span class="p">{</span>
            <span class="nx">ret</span> <span class="o">=</span> <span class="nx">DOM</span><span class="p">.</span><span class="nx">_getRegion</span><span class="p">(</span>
                <span class="nx">xy</span><span class="p">[</span><span class="mi">1</span><span class="p">],</span> <span class="c1">// top</span>
                <span class="nx">xy</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">+</span> <span class="nx">node</span><span class="p">.</span><span class="nx">offsetWidth</span><span class="p">,</span> <span class="c1">// right</span>
                <span class="nx">xy</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="o">+</span> <span class="nx">node</span><span class="p">.</span><span class="nx">offsetHeight</span><span class="p">,</span> <span class="c1">// bottom</span>
                <span class="nx">xy</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="c1">// left</span>
            <span class="p">);</span>
        <span class="p">}</span>

        <span class="k">return</span> <span class="nx">ret</span><span class="p">;</span>
    <span class="p">},</span>

    <span class="cm">/**</span>
<span class="cm">     * Find the intersect information for the passes nodes.</span>
<span class="cm">     * @method intersect</span>
<span class="cm">     * @param {HTMLElement} element The first element </span>
<span class="cm">     * @param {HTMLElement | Object} element2 The element or region to check the interect with</span>
<span class="cm">     * @param {Object} altRegion An object literal containing the region for the first element if we already have the data (for performance i.e. DragDrop)</span>
<span class="cm">     @return {Object} Object literal containing the following intersection data: (top, right, bottom, left, area, yoff, xoff, inRegion)</span>
<span class="cm">     */</span>
    <span class="nx">intersect</span><span class="o">:</span> <span class="kd">function</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">node2</span><span class="p">,</span> <span class="nx">altRegion</span><span class="p">)</span> <span class="p">{</span>
        <span class="kd">var</span> <span class="nx">r</span> <span class="o">=</span> <span class="nx">altRegion</span> <span class="o">||</span> <span class="nx">DOM</span><span class="p">.</span><span class="nx">region</span><span class="p">(</span><span class="nx">node</span><span class="p">),</span> <span class="nx">region</span> <span class="o">=</span> <span class="p">{},</span>
            <span class="nx">n</span> <span class="o">=</span> <span class="nx">node2</span><span class="p">,</span>
            <span class="nx">off</span><span class="p">;</span>

        <span class="k">if</span> <span class="p">(</span><span class="nx">n</span><span class="p">.</span><span class="nx">tagName</span><span class="p">)</span> <span class="p">{</span>
            <span class="nx">region</span> <span class="o">=</span> <span class="nx">DOM</span><span class="p">.</span><span class="nx">region</span><span class="p">(</span><span class="nx">n</span><span class="p">);</span>
        <span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="nx">Y</span><span class="p">.</span><span class="nx">Lang</span><span class="p">.</span><span class="nx">isObject</span><span class="p">(</span><span class="nx">node2</span><span class="p">))</span> <span class="p">{</span>
            <span class="nx">region</span> <span class="o">=</span> <span class="nx">node2</span><span class="p">;</span>
        <span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
            <span class="k">return</span> <span class="kc">false</span><span class="p">;</span>
        <span class="p">}</span>
        
        <span class="nx">off</span> <span class="o">=</span> <span class="nx">getOffsets</span><span class="p">(</span><span class="nx">region</span><span class="p">,</span> <span class="nx">r</span><span class="p">);</span>
        <span class="k">return</span> <span class="p">{</span>
            <span class="nx">top</span><span class="o">:</span> <span class="nx">off</span><span class="p">[</span><span class="nx">TOP</span><span class="p">],</span>
            <span class="nx">right</span><span class="o">:</span> <span class="nx">off</span><span class="p">[</span><span class="nx">RIGHT</span><span class="p">],</span>
            <span class="nx">bottom</span><span class="o">:</span> <span class="nx">off</span><span class="p">[</span><span class="nx">BOTTOM</span><span class="p">],</span>
            <span class="nx">left</span><span class="o">:</span> <span class="nx">off</span><span class="p">[</span><span class="nx">LEFT</span><span class="p">],</span>
            <span class="nx">area</span><span class="o">:</span> <span class="p">((</span><span class="nx">off</span><span class="p">[</span><span class="nx">BOTTOM</span><span class="p">]</span> <span class="o">-</span> <span class="nx">off</span><span class="p">[</span><span class="nx">TOP</span><span class="p">])</span> <span class="o">*</span> <span class="p">(</span><span class="nx">off</span><span class="p">[</span><span class="nx">RIGHT</span><span class="p">]</span> <span class="o">-</span> <span class="nx">off</span><span class="p">[</span><span class="nx">LEFT</span><span class="p">])),</span>
            <span class="nx">yoff</span><span class="o">:</span> <span class="p">((</span><span class="nx">off</span><span class="p">[</span><span class="nx">BOTTOM</span><span class="p">]</span> <span class="o">-</span> <span class="nx">off</span><span class="p">[</span><span class="nx">TOP</span><span class="p">])),</span>
            <span class="nx">xoff</span><span class="o">:</span> <span class="p">(</span><span class="nx">off</span><span class="p">[</span><span class="nx">RIGHT</span><span class="p">]</span> <span class="o">-</span> <span class="nx">off</span><span class="p">[</span><span class="nx">LEFT</span><span class="p">]),</span>
            <span class="nx">inRegion</span><span class="o">:</span> <span class="nx">DOM</span><span class="p">.</span><span class="nx">inRegion</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">node2</span><span class="p">,</span> <span class="kc">false</span><span class="p">,</span> <span class="nx">altRegion</span><span class="p">)</span>
        <span class="p">};</span>
        
    <span class="p">},</span>
    <span class="cm">/**</span>
<span class="cm">     * Check if any part of this node is in the passed region</span>
<span class="cm">     * @method inRegion</span>
<span class="cm">     * @param {Object} node2 The node to get the region from or an Object literal of the region</span>
<span class="cm">     * $param {Boolean} all Should all of the node be inside the region</span>
<span class="cm">     * @param {Object} altRegion An object literal containing the region for this node if we already have the data (for performance i.e. DragDrop)</span>
<span class="cm">     * @return {Boolean} True if in region, false if not.</span>
<span class="cm">     */</span>
    <span class="nx">inRegion</span><span class="o">:</span> <span class="kd">function</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">node2</span><span class="p">,</span> <span class="nx">all</span><span class="p">,</span> <span class="nx">altRegion</span><span class="p">)</span> <span class="p">{</span>
        <span class="kd">var</span> <span class="nx">region</span> <span class="o">=</span> <span class="p">{},</span>
            <span class="nx">r</span> <span class="o">=</span> <span class="nx">altRegion</span> <span class="o">||</span> <span class="nx">DOM</span><span class="p">.</span><span class="nx">region</span><span class="p">(</span><span class="nx">node</span><span class="p">),</span>
            <span class="nx">n</span> <span class="o">=</span> <span class="nx">node2</span><span class="p">,</span>
            <span class="nx">off</span><span class="p">;</span>

        <span class="k">if</span> <span class="p">(</span><span class="nx">n</span><span class="p">.</span><span class="nx">tagName</span><span class="p">)</span> <span class="p">{</span>
            <span class="nx">region</span> <span class="o">=</span> <span class="nx">DOM</span><span class="p">.</span><span class="nx">region</span><span class="p">(</span><span class="nx">n</span><span class="p">);</span>
        <span class="p">}</span> <span class="k">else</span> <span class="k">if</span> <span class="p">(</span><span class="nx">Y</span><span class="p">.</span><span class="nx">Lang</span><span class="p">.</span><span class="nx">isObject</span><span class="p">(</span><span class="nx">node2</span><span class="p">))</span> <span class="p">{</span>
            <span class="nx">region</span> <span class="o">=</span> <span class="nx">node2</span><span class="p">;</span>
        <span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
            <span class="k">return</span> <span class="kc">false</span><span class="p">;</span>
        <span class="p">}</span>
            
        <span class="k">if</span> <span class="p">(</span><span class="nx">all</span><span class="p">)</span> <span class="p">{</span>
            <span class="k">return</span> <span class="p">(</span>
                <span class="nx">r</span><span class="p">[</span><span class="nx">LEFT</span><span class="p">]</span>   <span class="o">&gt;=</span> <span class="nx">region</span><span class="p">[</span><span class="nx">LEFT</span><span class="p">]</span>   <span class="o">&amp;&amp;</span>
                <span class="nx">r</span><span class="p">[</span><span class="nx">RIGHT</span><span class="p">]</span>  <span class="o">&lt;=</span> <span class="nx">region</span><span class="p">[</span><span class="nx">RIGHT</span><span class="p">]</span>  <span class="o">&amp;&amp;</span> 
                <span class="nx">r</span><span class="p">[</span><span class="nx">TOP</span><span class="p">]</span>    <span class="o">&gt;=</span> <span class="nx">region</span><span class="p">[</span><span class="nx">TOP</span><span class="p">]</span>    <span class="o">&amp;&amp;</span> 
                <span class="nx">r</span><span class="p">[</span><span class="nx">BOTTOM</span><span class="p">]</span> <span class="o">&lt;=</span> <span class="nx">region</span><span class="p">[</span><span class="nx">BOTTOM</span><span class="p">]</span>  <span class="p">);</span>
        <span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
            <span class="nx">off</span> <span class="o">=</span> <span class="nx">getOffsets</span><span class="p">(</span><span class="nx">region</span><span class="p">,</span> <span class="nx">r</span><span class="p">);</span>
            <span class="k">if</span> <span class="p">(</span><span class="nx">off</span><span class="p">[</span><span class="nx">BOTTOM</span><span class="p">]</span> <span class="o">&gt;=</span> <span class="nx">off</span><span class="p">[</span><span class="nx">TOP</span><span class="p">]</span> <span class="o">&amp;&amp;</span> <span class="nx">off</span><span class="p">[</span><span class="nx">RIGHT</span><span class="p">]</span> <span class="o">&gt;=</span> <span class="nx">off</span><span class="p">[</span><span class="nx">LEFT</span><span class="p">])</span> <span class="p">{</span>
                <span class="k">return</span> <span class="kc">true</span><span class="p">;</span>
            <span class="p">}</span> <span class="k">else</span> <span class="p">{</span>
                <span class="k">return</span> <span class="kc">false</span><span class="p">;</span>
            <span class="p">}</span>
            
        <span class="p">}</span>
    <span class="p">},</span>

    <span class="cm">/**</span>
<span class="cm">     * Check if any part of this element is in the viewport</span>
<span class="cm">     * @method inViewportRegion</span>
<span class="cm">     * @param {HTMLElement} element The DOM element. </span>
<span class="cm">     * @param {Boolean} all Should all of the node be inside the region</span>
<span class="cm">     * @param {Object} altRegion An object literal containing the region for this node if we already have the data (for performance i.e. DragDrop)</span>
<span class="cm">     * @return {Boolean} True if in region, false if not.</span>
<span class="cm">     */</span>
    <span class="nx">inViewportRegion</span><span class="o">:</span> <span class="kd">function</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">all</span><span class="p">,</span> <span class="nx">altRegion</span><span class="p">)</span> <span class="p">{</span>
        <span class="k">return</span> <span class="nx">DOM</span><span class="p">.</span><span class="nx">inRegion</span><span class="p">(</span><span class="nx">node</span><span class="p">,</span> <span class="nx">DOM</span><span class="p">.</span><span class="nx">viewportRegion</span><span class="p">(</span><span class="nx">node</span><span class="p">),</span> <span class="nx">all</span><span class="p">,</span> <span class="nx">altRegion</span><span class="p">);</span>
            
    <span class="p">},</span>

    <span class="nx">_getRegion</span><span class="o">:</span> <span class="kd">function</span><span class="p">(</span><span class="nx">t</span><span class="p">,</span> <span class="nx">r</span><span class="p">,</span> <span class="nx">b</span><span class="p">,</span> <span class="nx">l</span><span class="p">)</span> <span class="p">{</span>
        <span class="kd">var</span> <span class="nx">region</span> <span class="o">=</span> <span class="p">{};</span>

        <span class="nx">region</span><span class="p">[</span><span class="nx">TOP</span><span class="p">]</span> <span class="o">=</span> <span class="nx">region</span><span class="p">[</span><span class="mi">1</span><span class="p">]</span> <span class="o">=</span> <span class="nx">t</span><span class="p">;</span>
        <span class="nx">region</span><span class="p">[</span><span class="nx">LEFT</span><span class="p">]</span> <span class="o">=</span> <span class="nx">region</span><span class="p">[</span><span class="mi">0</span><span class="p">]</span> <span class="o">=</span> <span class="nx">l</span><span class="p">;</span>
        <span class="nx">region</span><span class="p">[</span><span class="nx">BOTTOM</span><span class="p">]</span> <span class="o">=</span> <span class="nx">b</span><span class="p">;</span>
        <span class="nx">region</span><span class="p">[</span><span class="nx">RIGHT</span><span class="p">]</span> <span class="o">=</span> <span class="nx">r</span><span class="p">;</span>
        <span class="nx">region</span><span class="p">.</span><span class="nx">width</span> <span class="o">=</span> <span class="nx">region</span><span class="p">[</span><span class="nx">RIGHT</span><span class="p">]</span> <span class="o">-</span> <span class="nx">region</span><span class="p">[</span><span class="nx">LEFT</span><span class="p">];</span>
        <span class="nx">region</span><span class="p">.</span><span class="nx">height</span> <span class="o">=</span> <span class="nx">region</span><span class="p">[</span><span class="nx">BOTTOM</span><span class="p">]</span> <span class="o">-</span> <span class="nx">region</span><span class="p">[</span><span class="nx">TOP</span><span class="p">];</span>

        <span class="k">return</span> <span class="nx">region</span><span class="p">;</span>
    <span class="p">},</span>

    <span class="cm">/**</span>
<span class="cm">     * Returns an Object literal containing the following about the visible region of viewport: (top, right, bottom, left)</span>
<span class="cm">     * @method viewportRegion</span>
<span class="cm">     @return {Object} Object literal containing the following about the visible region of the viewport: (top, right, bottom, left)</span>
<span class="cm">     */</span>
    <span class="nx">viewportRegion</span><span class="o">:</span> <span class="kd">function</span><span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="p">{</span>
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            <span class="nx">scrollX</span><span class="p">,</span>
            <span class="nx">scrollY</span><span class="p">;</span>

        <span class="k">if</span> <span class="p">(</span><span class="nx">node</span><span class="p">)</span> <span class="p">{</span>
            <span class="nx">scrollX</span> <span class="o">=</span> <span class="nx">DOM</span><span class="p">.</span><span class="nx">docScrollX</span><span class="p">(</span><span class="nx">node</span><span class="p">);</span>
            <span class="nx">scrollY</span> <span class="o">=</span> <span class="nx">DOM</span><span class="p">.</span><span class="nx">docScrollY</span><span class="p">(</span><span class="nx">node</span><span class="p">);</span>

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</pre></div>

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                                <li class=""><a href="module_slider.html" title="slider">slider</a></li>
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                                <li class=""><a href="module_stylesheet.html" title="stylesheet">stylesheet</a></li>
                                <li class=""><a href="module_substitute.html" title="substitute">substitute</a></li>
                                <li class=""><a href="module_swf.html" title="swf">swf</a></li>
                                <li class=""><a href="module_swfdetect.html" title="swfdetect">swfdetect</a></li>
                                <li class=""><a href="module_tabview.html" title="tabview">tabview</a></li>
                                <li class=""><a href="module_test.html" title="test">test</a></li>
                                <li class=""><a href="module_widget.html" title="widget">widget</a></li>
                                <li class=""><a href="module_widget-anim.html" title="widget-anim">widget-anim</a></li>
                                <li class=""><a href="module_widget-child.html" title="widget-child">widget-child</a></li>
                                <li class=""><a href="module_widget-locale.html" title="widget-locale">widget-locale</a></li>
                                <li class=""><a href="module_widget-parent.html" title="widget-parent">widget-parent</a></li>
                                <li class=""><a href="module_widget-position.html" title="widget-position">widget-position</a></li>
                                <li class=""><a href="module_widget-position-align.html" title="widget-position-align">widget-position-align</a></li>
                                <li class=""><a href="module_widget-position-constrain.html" title="widget-position-constrain">widget-position-constrain</a></li>
                                <li class=""><a href="module_widget-stack.html" title="widget-stack">widget-stack</a></li>
                                <li class=""><a href="module_widget-stdmod.html" title="widget-stdmod">widget-stdmod</a></li>
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                    <div id="fileList" class="module">
                        <h4>Files</h4>
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                                <li class=""><a href="color.js.html" title="color.js">color.js</a></li>
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                                <li class=""><a href="dom-screen.js.html" title="dom-screen.js">dom-screen.js</a></li>
                                <li class=""><a href="dom-size.js.html" title="dom-size.js">dom-size.js</a></li>
                                <li class=""><a href="dom-style.js.html" title="dom-style.js">dom-style.js</a></li>
                                <li class=""><a href="dom.js.html" title="dom.js">dom.js</a></li>
                                <li class=""><a href="selector-css2.js.html" title="selector-css2.js">selector-css2.js</a></li>
                                <li class=""><a href="selector-css3.js.html" title="selector-css3.js">selector-css3.js</a></li>
                                <li class=""><a href="selector-native.js.html" title="selector-native.js">selector-native.js</a></li>
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